Y3T training - or Yoda Three Training - was developed by bodybuilder Neil "Yoda" Hill. It cycles three different styles of training: Week 1 - Compound exercises involving the use of heavy weight. Week 2 - A mix of compound and isolation exercises using a more moderate weight. Week 3 - A mix of compound and isolation exercises with a focus on higher reps and high intensity. You repeat this cycle 3 times, and then change exercises. Therefore, each cycle lasts 9 weeks. During each subsequent week, try to add more weight for all exercises. Google it for more info.